Track-drilling machine.



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Patented Feb. 18, 1919.

E. PIERCE.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 23. I9I5.

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TRACK DRILLING MACHINE.

APPLICATlGN'FILED FEB.23.1915.

1,294,702. q Patented Feb. 18, 1919.

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E. PIERCE.

TRACK DRILLING MACHINE. APPLICATION FILED 3.123. I915.

may/4b EDWARD PIERCE, OF WEST BURLINGTON, IOWA.

TRACK-DRILLING MACHINE.

Application filed. February 23, 1915.

To all whom it may concern:

Be it known that I, EDWARD PIERCE, a citizen of the United States, residing at West Burlington, in the county of Des Moines and State of Iowa, have invented certain new and useful Improvements in Track-Drilling Machines, of which the fol-- lowing is a specification.

This invention relates to track drilling machines, and has for its principal object to provide an improved apparatus particularly adapted for use in drilling the rails of a railway track. More particularly my invention comprises a portable drilling machine which may be conveniently transported and adjusted in position for drilling holes in rails, while they are in position on or adjacent to the road bed.

Another feature of the invention relates to the improved means for manually operating the machine whereby the drill is continuously driven when so desired. A further feature relates to the means carried by the machine for gripping the rail to be drilled whereby the machine is held in prolper operative position with respect to the rai Still another object is to provide improved feeding means for advancing the drill, which feeding means may be rendered inoperative when desired.

A further object is to provide means for permitting a proper alinement of the drill with the member being operated upon by the machine.

These and other objects of the invention will be more particularly set forth in the following specification taken with the accompanying drawings in which I have illustrated one embodiment of the invention.

In the drawings;

Figure 1 is an end elevation of my improved track drilling machine looking toward the end shown at the left in Fig. 2;

Fig. 2 is a top plan view of the main frame of my machine, a portion thereof being broken away;

Fig. 3 is a side elevation of one of the complementary portions of the main frame shown in Fig. 2;

Fig. 4c is an end elevation of the subframe carried by the main frame;

. Fig. 5 is a top plan view of the subframe shown in Fig. 4;

Fig. 6 is a side elevation of the subframe shown in Figs. 4 and 5;

Specification of Letters Patent.

Patented Feb. 18, 1919.

Serial No. 10,048.

Fig. 7 is an enlarged side elevation of my improved track drilling machine;

Fig. 8 is an enlarged end elevation of the rail hook and associated parts;

Fig. 9 is a top plan view of my improved machine; Fig. 10 is a plan view of the rail hook operating lever;

Fig. 11 is a perspective view of the rail hook pinion member;

Fig. 12 is a longitudinal vertical sectional view taken along the line 1212 of Fig. 9, looking in the direction of the arrows;

Fig. 13 is a detail sectional view taken on the line 13-13 of Fig. 12 looking in in the direction of the arrows;

Fig. 14.- is a top plan view of the spindle driving pinion; and

Fig. 15 is a sectional view taken on the line 1515 of Fig. 14:, looking in the direction of the arrows.

Referring to the drawings my improved machine is shown as comprising a main frame A which is made up of two complementary frame members each of which comprises an upwardly extending side wall or flange 26, an upwardly extending rear wall 27, and a floor portion 28. The frame members are further provided with integral lugs 29 which extend outwardly from the upper portions of the rear walls 27 and which are adapted to be engaged by a bolt 30 which secures the parts together, and the rear walls 27 are further provided with right angular slots which form the rectangular aperture 27, for a purpose to be hereinafter described. The main frame members 25 are further secured together by a bolt 31 which extends through alining apertures in the side walls 26 above the floor portions 28. The forward portions of the frame members are provided with two offset lugs 32 which are apertured to be engaged by a bolt 33 for securing the forward portions of the frame members together. Extending outwardly from opposite sides of the frame members 25 are U- shaped base plates or brackets 34, and, formed integrally with each of these brackets and with the adjacent side wall or flange of the main frame, are upwardly extending ribs or plates 35 which are located in pairs above the arms of the brackets 34 and provided with oppositely disposed circular lugs 36.

Pivoted on the lugs 36 and supported by the U-shaped plates 34 at each side of the machine are seats 37 which are carried by upwardly extending arms 37 having offset portions 37 which rest upon the U-shaped plates 34 and which are a ertured to engage the lugs 36. The arms 3 a of the seats may be pressed inwardly toward each other so as to cause the portions 37 to pass out of engagement with the lugs 36, whereby the seats may be removed from the main frame. It will also be seen that the seats may be moved about their pivots in order to occupy a position above the main frame, when the machine is being carried, for instance.

Extendin upwardly and outwardly from the forwarc portions of the main frame members 25 are two upwardly extending arms or brackets 38 which are provided on their inner adjacent faces with integral circular lugs 39, and which are offset inwardly toward each other at 40 and then turned outwardly and forwardly from the main frame, terminating in the parallel plates 41. The parallel plates 41 are provided with the upwardly extending portions 41% alining pairs of apertures 42 and 43, and with alining slots 44 between the jaws 45 and 46.

Supported by the upwardly extending arms or brackets 38 and between the parallel plates 41 is a rail hook 47 having a palr of downwardly turned hooked jaws 48' which are adapted to engage the head and adjacent portions of a railway rail. The rail hook 47 is provided with a longitudinal slot 49 which is curved upwardly at 50 and which is engaged by a bolt 51 extending through the alining apertures 43 in the main frame members, thus permitting longitudinal movement of the rail hook. Forwardly of the longitudinal slot 49 the rail hook is provided with two oppositely projecting lugs 52 which are adapted to engage the slot 44 when the rail hook is in its normal engaging position, as shown for instance in Figs. 7 and 12. The upper side of the rail hook adjacent the forward portion of the longitudinal slot 49 has formed thereon a series of rack teeth 53 which are adapted to coact with the teeth 54 of a rail hook operating pinion 55 which is centrally apertured to form a pivotal connection with the bolt or pin 56 extending through the alining apertures 42 in the upwardly projecting portions 41 of the main frame members. The rail hook pinion 55 is provided with an integral jaw 57 which is adapted to engage a horn 58 which extends upwardly from the inner or rear portion of the rail hook, and

' the rail hook pinion is further provided with a forwardly extending arm 58 which is apertured at 59 and which has pivotally secured thereto. the rail hook operating lever 60. A belt or pin 61 engages the aperture 62 in the rail hook lever 60 and the aperture 59 in the rail hook pinion to form the pivotal connection between said members. The upwardly extending portions 41 of the plates 41 are provided with curved edges which are concentric with the apertures 42, and these upwardly extending portions are further provided with alining notches 41 which are adapted to be engaged by the extremity 63 of the rail hook lever or by the laterally extending jaw or flange 64 of said lever when it is rotated about its pivotal connection on the rail hook pinion. From the foregoing description it will be seen that the rail hook lever 60 may be moved in a substantially vertical plane and in an upward direction from the position shown in Fig. 7 to rotate the rail hook pinion 55 and thereby move the rail hook to the position shown by dotted lines in Fig. 12, through the agency of the rack teeth 53 formed on the upper side of the rail hook.

As the rail hook pinion is rotated the rail hook will move forwardly from the main frame until the pins 52 rest upon the forward projecting portions of the aws 46 beyond the extremities of the jaws 45 and the jaw 57 of the rail hook pinion will then engage the upwardly extending horn 58 and cause the rail hook to move upwardly as the curved portion 50 of the slot 49 engages the supporting bolt or pin 51. When in the position shown by dotted lines in Fig. 12, the rail hook lever 60 may be rotated laterally about the pin 61 until the projecting flange 64 of said hook and the extremity 63 thereof engage suitable alining notches 41", whereupon the rail hook will be held in said position.

Supported within the main frame A, above described, is the sub-frame B which carries the principal operating mechanism of my machine. The forward portion of the main frame Bis provided with two parallel forwardly projecting plates which terminate in hub portions 71 having alining apertures 72 therethrough which are adapted to engage the circular lugs 39 formed on the main frame, whereby the subframe B is pivotally supported on the main frame A. It will be apparent that the subframe B is placed in such position while the main frame is being assembled. The subframe B also comprises the lower floor portion 73, the upwardly extending side plates 74 and 74", and the front and rear supporting plate members 75 and 7 6. The supporting frame members 75 and 76 are pro-' ing stud 91 which is adapted to tures formed therethrough. The supporting plates or members 75 and 76 are provided with lateral extensions 81 having alining apertures 82 extending therethrough, for a purpose to be hereinafter described. An integral bar 74 extends between the upper parts of the projecting plates 81 and the side wall 74* terminates some distance be low the alining apertures 82. When the sub-frame is in position within the main frame as shown particularly in Fig. 12, the rearwardly projecting hub portion 78 will extend through the rectangular slot 27 formed in the rear walls 27 of the main frame, thereby permitting an upward movement of the sub-frame about the pivotal supports 39 at the forward portion thereof. At the same time the upper and lower walls of the slot 27 will limit the amount of said pivotal movement. It will be seen that the lower portion of the sub-frame B is of suitable contour to clear the bolts 31 and 33 which extend through the members 25 of the main frame.

In the foregoing description I have set forth the frame structure of my machine and the means for holding a rail in position to be drilled, and I will now describe the mechanism by means of which the drilling function is performed. This mechanism comprises a drill spindle 85 which is externally threaded at 86 to form a threaded engagement with the feed pinion 87 having the integral sleeve portion 87 of reduced diameter which is rotatably mounted in the hub 77 of the sub-frame above described. The feed pinion 87 is spaced from the hub portion 77 of the sub-frame by a ball-bearing thrust collar 88, and said feed pinion is maintained in position in its bearing by a collar 89 having the stud 90 ex tending therethrough and engaging the sleeve portion 87 of said pinion. The enlarged forward portion 85 of the drill spindle is threadedly engaged by a radially extendpass into the longitudinal axial slot 92 which is formed in the drill spindle to receive the drill. By means of the stud 91 any suitable size of drill may he securedly fixed in the drill spindle, and it is further to be noted that the axes of the lugs 39 lie substantially within the plane of the longitudinal axis of the drill and drill spindle. It will also be evident that the forward advance or feed of the drill per revolution will be measured by the difference between the angular advance of the drill spindle relatively to the feed pinion and the angular advance of the threads of the feed pinion relatively to the frame.

The means for driving the drill spindle 85 and the feed pinion 87 comprises an operating lever 93 which'is pivotally mounted to move in a substantially vertical plane between the supporting seats 37 which are to be occupied by the operators of the machine. The operating lever 93 is provided with the oppositely disposed handles 93 of suitable form to be engaged by the hands of the operators, and the lower portion of said operating lever is rigidly secured in the oppositely disposed brackets or lever forks 94 and 95 by means of the bolts 96 and 97. The brackets 94 and 95 each comprise downwardly extending plates 94 and 95 respectively, which terminate in the respective hub portions 94 and 95 The hub portions 91 and 95 are rotatably mounted upon the respective sleeve portions 98 and 99 of the driving ratchets 98 and 99. R0- tatably mounted in the hub portions 7 9 and 80 of the sub-frame B is a supporting shaft or bolt 100 which is secured in position by the nut 101 seating upon the washer 101. The driving ratchet 98 is keyed upon the reduced portion 100 of said shaft and the driving ratchet 99 is rotatably mounted upon the enlarged portion 100 of said shaft. A feed gear 102 is keyed or otherwise secured to the forward projecting extremity of the shaft 100 and arranged to mesh with the pinion 87 previously described. The driving ratchets 98 and 99 have secured thereto by means of rivets 103 the driving gears 104; and 105 of which the former is secured to the reduced portion 100 of the shaft 100, while the last mentioned gear 105 is mounted to rotate with the ratchet 99 on the enlarged portion 100 of said shaft. Rotatably mounted upon the bolt 97 between the plates 9 1 and 95 and the respective plates 94 and 95 of the lever forks are two ratchet driving pawls 106 and 107 which are directed oppositely from the vertical center line of the machine, as shown particularly in Fig. 1, in order that one of said pawls will operate to rotate one of the driving ratchets 98 or 99 upon each forward and reverse movement of the operating lever 93.

he driving gear 104 which is secured to the driving ratchet 98 is arranged to mesh with the spindle pinion 110 having the cylindrical sleeve portion 111 which is rotatably mounted in the hub portion 78 of the sub-frame previously described. The spin dle pinion 110 is spaced from the feed pinion 87 by the spacing sleeve 112. It will be apparent that if the spindle pinion 110 be non-rotatably secured to the drill spindle 85,'s'aid spindle will be driven with each rotation of the driving gear 104, but since said gear is directly actuated only during the movement of the operating lever 93 toward the left, as viewed in Fig. 1, I have provided the driving gear 105 which is driven in the reverse direction of rotation during the movement of the operating lever 93 toward the right, as viewed in Fig.

1. In order to operatively connect 'the driving gear 105 to the spindle pinion 110 so that said spindle pinion will be continuously actuated in the same direction of rotation, I provide an intermediate idler gear 113 rotatably mounted on the shaft 11% which is secured in the apertures 82 in the outwardly projecting portions 81 of the sub-frame B. The idler gear 113 is formed with two spaced apart gears 113 and 113 which mesh with the driving gear 105 and the spindle pinion 110, respectively. It will, therefore, be seen that the gear 105 which is actuated by the pawl 107 upon movement of the operating lever toward the right, as viewed in Fig. 1, will operate to drive the spindle pinion 110 during the period when the driving gear 104: is not being actuated by the pawl 106.

Although any suitable means may be employed for causing the spindle pinion 110 to non-rotatively engage the drill spindle 85, I prefer to employ a clutch mechanism comprising the housing 115 which is preferably knurled or otherwise roughened on its outer surface and which is apertured at 115 to engage the drill spindle. The housing 115 is maintained in position abutting against the end of the hub 78 of the sub-frame by means of a stud 116 which engages an annular groove or slot 117 in the sleeve portion 111 of the spindle pinion. It will be seen that the stud 116 and groove 117 serve also to maintain the drill spindle in proper position spaced from the feed pinion 87, thus supplementing the action of the spacing sleeve 11.2. The cylindrical housing 115 is provided on its inner side with a cam surface 118 ,which is adapted to coact with two clutch dogs 119 in such a manner as to permit said dogs to pass into engagement with the longitudinal slots or keyways 120 which are formed in the drill spindle 85. The sleeve portion 111 of the spindle pinion 110 is also provided with two longitudinally extending slots or keyways 121 which are adapted to aline .with the keyways 120 in the drill spindle, and these keyways are cut completely through the sleeve portion 111 at the points 121 so as to permit the forward portions 119 of the clutch dogs to pass through said sleeve portions of the spindle pinion into the keyways 120. The middle portions of the dogs 119 are supported upon the seats 121 formed by the bottom of the keyways 121, and the outer extremities of the dogs 119 remote from the spindle pinion 110, are normally projected away from each other by means of the curved leaf spring 122 which engages notches 123 in said dogs. It will be apparent that when the housing 115 is rotated to press the outer extremities of the dogs 119 toward each other, the forward extremities 119 of said dogs will be passed out of engagement with the keyways 120, thus permitting the spindle pinion 110 to rotate freely on the drill spindle. WVhen said housing is rotated to the position shown in Fig. 12, for instance, the cam surface 118 will permit the spring 122 to project the outer portions of the dogs away from each other, whereby the forward extremities of the dogs .will cause the spindle pinion to nonrotatively engage the drill spindle. In order that the drill spindle may be rotated rapidly and in an anti-clockwise direction to quickly withdraw the drill in a direction opposite to the direction of its feed, I provide a hand crank 125 which is secured to the projecting extremity of the drill spindle to serve as a means for rotating the same.

When it is desired to use my improved machine for drilling holes through railway rails for instance, said machine may be readily transported to the desired location, and it is then placed in position adjacent the rail to be drilled in such a manner that the rail hook 47 will extend over the rail. The machine is especially adapted for drilling rails which are in position on the road bed, but it is equally applicable for drilling rails or other members in other positions. After placing the machine in position on the ties or other support adjacent the rail, the rail hook lever 60 is rotated to pass the projection 64 and the extremity 63 out of engagement with the notches 4:1 .which may be holding the rail hook in inoperative position. The rail hook lever 60 is then moved downwardly and to the right, as viewed in Figs. 7 or 12, thereby causing the rail hook to move downwardly until the pins 52 rest upon the jaws 16 after which the continued operation of the rail hook lever .will move the rail hook horizontally and inwardly toward the machine until the downwardly projecting hooked jaws 48 engage the rail to be drilled in such a manner as to hold the rail and the main frame A of the machine in the proper relative positions for the operation of the drill mechanism. When this adjustment has been made the rail hook lever is again rotated transversely on the pivot pin 61 so as to cause the flange 6a and 115 the extremity 63 of said lever to engage a suitable pair of notches 11 whereby the parts are held in the desired adjusted position.

After the machine has been adjusted in 120 operative position, as above described, the operators preferably seat themselves on the seats 37 at opposite sides of the machine, which seats are so located that the handles 9 1 of the operating lever 93 may be conven- 125 iently grasped in order to give said lever a fore and aft movement which .will operate the drill mechanism.

From the foregoing description it will be understood that as the operating lever 93 130 is moved toward the left, as viewed in Fig. 1, and away from the observer as viewed in Fig. 12, the driving ratchet 98 will be actuated to rotate the driving gear 104: in such a manner as to rotate the spindle pinion 110 in a clockwise direction, as viewed in Fig. 1, it being assumed that the clutch mechanism has been operated to cause said spindle pinion to have driving engagement with the drill spindle. At the same time the shaft 100 will be rotated, thereby driving the feed gear 102 so that the feed pinion 87 will also be driven in a clockwise direction, as viewed in Fig. 1. The drill spindle 85 and the drill carried thereby will then advance longitudinally to the right, as viewed in Fig. 12 for instance, an amount measured by the difierence between the angular advance of the threads of the feed pinion 87 and the threads of the drill spindle. When the operating lever 93 is moved to the right, as viewed in Fig. 1, the pawl 106 will be inoperative but the pawl 107 will actuate the driving ratchet 99 so as to rotate the driving gear 105 on the shaft 100 and thereby drive the idler gear 113 in such a manner that the spindle pinion 110 will continue to rotate in a clockwise direction, as viewed in Fig. 1. As the spindle pinion 110 rotates in a clockwise direction during the movement of the lever to the right, as viewed in Fig. 1, said spindle pinion will drive the gear 104: in the same direction that said gear rotated during the movement of the lever 93 to the left, whereby the shaft 100 will be continuously rotated so as to drive the feed gear 102 and the feed pinion 87 in the same direction that said member rotated during the next preceding movement of the operating lever. It will be apparent that I have provided an improved means for continuously driving the drill spindle so that there is no lost motion or waste of energy during the operation of the operating lever 93 and at the same time I have provided an improved construction whereby the drill spindle may be advanced longitudinally without interruption during the operation of the driving mechanism. It will be understood that my improved construction per- 7 mits the spindle to have a feed which may be varied as desired by changing the relative ratio of the feed gear 102 and feed pinion 87 After completing the drilling of a hole through the member being operated upon, the clutch housing 115 may be rotated so as to press the dogs 119 out of engagement with thekeyways 120 so that crank handle 125 may be manipulated to quickly move the drill spindle and the drill carried thereby away from the rail or other member being operated upon.

A very important feature of my invention lies in the construction and arrangement of parts whereby the drill spindle and drill operating mechanism are carried by the sub-frame B, which is pivotally mounted on the main frame in such a manner that the sub-frame and the drill spindle may oscillate vertically so as to maintain the drill in proper alinement with the member being operated upon. The thrust transmitted through the drill spindle will operate to maintain the sub-frame B in balanced position during the operation of the drill mechanism, so that the binding of the drill in the hole bein drilled is prevented and an easy and efiicient action of the drill mechanism is maintained at all times. During the drilling operation the thrust which is received by the drill spindle is transmitted to the ball-bearing thrust collar 88, so as to relieve the wear and strain upon the parts of the machine. It will be observed that the frames A and B have their lower portions substantially closed, so that dirt and foreign materials are prevented from entering the drill mechanism.

While I have shown and described a par- 'ticular construction of my improved track drilling machine, and have described its use in a more or less particular manner, it will be understood that the invention may be used in other situations, and may itself partake of widely difierent forms without departing from the scope of the invention as defined in the appended claims.

What I claim is:

1. In a device of the class described, a main frame, a sub-frame pivotally mounted in said main frame on immovable pivots, a drill spindle mounted in said sub-frame, driving mechanism carried by said subframe for actuating said spindle, and an operating lever mounted on said sub-frame andarranged to actuate said driving mechanism on each forward and reverse stroke thereof.

2. In a device of the class described, a frame having a pair of forwardly projecting arms, a rail tong pivotally mounted on said arms, means for operating said tong to secure said frame in fixed position with respect to a rail, a drill spindle carried by said frame and projecting between said arms, and means to operate said drill spindle.

3. In a device of the class described, a main frame, means carried by said main frame to engage a rail, a sub-frame pivotally mounted in said main frame at the end of the latter adjacent said rail, a drill spindle mounted in said sub-frame transversely to the axis of said pivotal connection, and driving mechanism carried by said sub-frame and operatively connected to said drill spindle on the side of said pivotal axis opposite said rail.

4. In a device of the class described, a

frame, a drill spindle mounted in said frame, driving mechanism for said drill spindle, a lever for actuating said driving mechanism on each forward and reverse stroke thereof, means carried by said frame for engaging a rail, and continuously actuated feeding means operated by said driving mechanism for advancing said spindle toward said rail.

5. In a device of the class described, a main frame, a sub-frame pivotally mounted in and carried by said main frame, and a drill spindle mounted in said sub-frame transversely to the axis of said pivotal connection, said pivotal connection being located adjacent the forward end of said spindle.

6. In a device of the class described, a main frame, a sub-frame pivotally mounted in and carried by said main frame, a drill spindle mounted in said sub-frame transversely to the axis of said pivotal connection, spindle operating mechanism carried by said sub-frame, and means carried by said main frame for holding a rail in positlon opposlte said spindle.

7. In a device of the class described, a frame, means carried by said frame for gripping a rail, a spindle arranged to receive a drill, and means for actuating said spindle, said spindle being mounted to permit swinging thereof about an axis adjacent its receiving end.

8. In a device of the class described, a frame, means carried by said frame for gripping a rail, a spindle arranged to receive a drill, and means for actuating said spindle, said spindle being mounted to permit swinging thereof in a plane transversely to the axis of said rail during the operation of the device.

9. In a device of the class described, a main frame, a sub-frame carried by said main frame, a drill spindle mounted in said subframe, a shaft mounted in said subframe above said drill spindle, driving con nections from said shaft to said spindle, a clutch for releasing said spindle, reciprocating actuating means for operating said shaft, clamping means for attaching said main frame to a rail, and means for adjusting said clamping means.

10. In a device of the class described, a frame, means for attaching said frame to a rail, a drill spindle carried by said frame, a shaft mounted in said frame parallel to said spindle, a pivotally mounted operating arm, ratchet members carried by said shaft and actuated alternately by said operating arm, driving connections from said ratchet memhere to said spindle, one of said ratchet members being actuated by said driving connections when the other ratchet member is being operated by said operating arm, whereby one of said ratchet members operates continuously, and means actuated by said continuously operating ratchet member for feeding said spindle.

11. In a device of the class described, a frame, drill operating mechanism carried by said frame, said frame having a projection extending forwardly therefrom, a

hooked member adapted to engage a rail to hold the same adjacent said frame, said hooked member being pivotally and slidably mounted on said projection, and an operating handle cooperating with said hooked member for moving the same transversely to the axis of said rail.

12. In a device of the class described, a frame a drill spindle rotatably mounted in said frame, a pivotally mounted operating lever, means to transform the reciprocating motion of said lever into rotary motion of said spindle in the same direction upon each forward and reverse stroke of said lever, means to feed said spindle in the direction of its axis, said first named means being substantially immovable in the direction of said axis, and means to release said spindle to permit a rapid reverse movement thereof opposite to the direction of feed.

13. In a device of the class described, a frame, a threaded spindle, a feed member rotatably mounted in said frame and having a centrally threaded aperture engaged by said spindle, driving mechanism to rotate said spindle, an operating lever arranged to actuate said driving mechanism upon each forward and reverse stroke thereof, means to rotate said feed member in the same direction that said spindle rotates but at a different rate of rotation, and means to release said driving mechanism from said spindle to permit reverse rotation of said spindle in said feed member.

14. In a device of the class described, a frame, a threaded spindle, a feed member rotatably mounted in said frame and having a centrally threaded aperture engaged by said spindle, means to rotate said spindle, means to rotate said feed member in the same angular direction, means to release said first named means from said spindle, and a handle operatively connected to said spindle for manually effecting a reverse rotation thereof in said feed member after said spindle has been released. 7

15. In a device of the class described, a frame, a threaded spindle, a feed member rotatably mounted in said frame and having a centrally threaded aperture engaged by said spindle, a driving pinion loosely mounted on said spindle, means for forming a driving engagement between said driving pinion and said spindle, an operating lever, a system of gearing for actuating said driving pinion from said operating lever, and a second system of gearing associated with said first named system for continuously driving said feed pinion.

16. In a device of the class described, a frame, a threaded spindle, a feed member rotatably mounted in said frame and having a centrally threaded aperture engaged by said spindle, a driving pinion loosely mounted on said spindle, means for forming a driving engagement between said driving pinion and said spindle, an operating lever, a system of gearing associated with said operating lever and arranged to rotate said driving pinion in the same direction upon each forward and reverse stroke of said lever, and a system of gearing actuated by said first named system for continuously driving said feed pinion in the same direction as said driving pinion but at a different s eed.

17. In a device of the class described, a frame, a drill spindle rotatably mounted with respect to said frame, a driving pinion operatively connected to said spindle, a shaft mounted in said frame parallel to said spindle, a gear fixed on said shaft and operatively connected to said driving pinion, a second gear rotatably mounted on said shaft and operatively connected to said pinion, operating means for actuating said gears in alternation to effect a continuous rotation of said driving pinion in the same direction, a feed gear fixed on said shaft, and a feed pinion threadedly engaging said spindle and operatively connected to said feed gear. 18. In a device of the class described, a frame, drill mechanism carried by said frame, said frame having an upwardly extending part, a hook member mounted on said part, said hook member having a longitudinal slot therein, a pin carried by said part and engaging said slot, a recess on the forward end of said part adapted to be engaged by a projection on said hook member, and means mounted above said hook member for moving the same forwardly on said pin and thence upwardly about said pin.

Copies of this. patent may be obtained for 19. In a device of the class described, a frame, drill mechanism carried by said frame, said frame having upwardly and forwardly extending arms, a hook member mounted between said arms and having a longitudinal slot therein, a pin engaging said arms and slot, said arms having notches in the forward ends thereof, projections on said hook member adapted to engage said notches, teeth carried by said hook member, a pinion carried by said arms and arranged to mesh with said teeth, and an operating arm connected to said ratchet member for rotating the same, whereby said hook member may be moved forwardly on said pin to pass said projections out of engagement with said notches.

20. In a device of the class described, a frame, drill mechanism carried by said frame, said frame having upwardly and forwardly extending arms, a hook member mounted between said arms and having a longitudinal slot therein, a pin engaging said arms and slot, said arms having notches in the forward ends thereof, projections on said hook member adapted to engage said notches, teeth carried by said hook member, a pinion carried by said arms and arranged to mesh with said teeth, said hook member having an upward projection on one end thereof, and an arm carried by said ratchet member to engage said upward projection, whereby the rotation of said ratchet member will move said hook member longitudinally on said pin to pass said first-named projections out of said notches and will then cause said arm of said ratchet member to engage said upward projection on said hook member and move the latter upwardly about said 1n. P In testimony whereof, I have subscribed my name.

EDWARD PIERCE.

I Witnesses:

N. S. AUGSBURGER, C. A. HENRY.

five cents each, by addressing the Gommissioner of Patents,

Washington, D. G. 

